I guess, People who want to transfer their coins with low fees, because BSC is now much cheaper than ETH gas fees, then we all know what will happen to Ethereum in the near future if they don't adjust their gas fees in transferring money. They already have competitors so better yet make a good deal on transfer fees.
And what happens to ETH is that the price increase is getting better and also almost surpasses the new ATH in the next few days, You need to know mate that competing with ETH is not enough to make cheap fees for transactions, because cheap fees have come a long way days are on the TRON Blockchain (TRC20) and also on Polygon (Matic) at this time both of which are still equally cheap and even cheaper than transaction fees on BSC, but they can't compete with Ethereum, I hope you can be very aware now.
You've got it a little wrong. The reason ETH is still superior to the other cheaper platforms is because Ethereum is the only one (of the mentioned) that is truly decentralized. The Binance Chain is not decentralized, TRON and MATIC are not completely decentralized either. This is also the reason why the fees are significantly cheaper than Ethereum. Should the platforms be completely decentralized at some point and still be significantly cheaper, many app developers and investors would switch to these platforms and leave Ethereum.